7715938990 has 16 divisors (see below), whose sum is σ = 13889872080. Its totient is φ = 3086112960.

The previous prime is 7715938949. The next prime is 7715938999. The reversal of 7715938990 is 998395177.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7715938999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128146 + ... + 178474.

It is an arithmetic number, because the mean of its divisors is an integer number (868117005).

Almost surely, 2^7715938990 is an apocalyptic number.

7715938990 is a deficient number, since it is larger than the sum of its proper divisors (6173933090).

7715938990 is a wasteful number, since it uses less digits than its factorization.

7715938990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65667.

The product of its (nonzero) digits is 4286520, while the sum is 58.

The square root of 7715938990 is about 87840.4177471852. The cubic root of 7715938990 is about 1976.0424120602.

The spelling of 7715938990 in words is "seven billion, seven hundred fifteen million, nine hundred thirty-eight thousand, nine hundred ninety".